diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Changelog for persistent-postgresql
 
+## 2.13.3.0
+
+* [#1349](https://github.com/yesodweb/persistent/pull/1349)
+    * Add `BackendCompatible (RawPostgresql b) (RawPostgresql b)` instance.
+
 ## 2.13.2.2
 
 * [#1351](https://github.com/yesodweb/persistent/pull/1351/)
diff --git a/Database/Persist/Postgresql.hs b/Database/Persist/Postgresql.hs
--- a/Database/Persist/Postgresql.hs
+++ b/Database/Persist/Postgresql.hs
@@ -1838,6 +1838,9 @@
     -- @since 2.13.1.0
     }
 
+instance BackendCompatible (RawPostgresql b) (RawPostgresql b) where
+    projectBackend = id
+
 instance BackendCompatible b (RawPostgresql b) where
     projectBackend = persistentBackend
 
diff --git a/persistent-postgresql.cabal b/persistent-postgresql.cabal
--- a/persistent-postgresql.cabal
+++ b/persistent-postgresql.cabal
@@ -1,5 +1,5 @@
 name:            persistent-postgresql
-version:         2.13.2.2
+version:         2.13.3.0
 license:         MIT
 license-file:    LICENSE
 author:          Felipe Lessa, Michael Snoyman <michael@snoyman.com>